Fluid discharge apparatus



Aug. 24, 1937. Q s 2,091,166

FLUID DI S CHARGE APPARATUS Filed March 19, 1937 T how-mas. C, Skids nrrr Patented Aug. 24, 1937 2,091,166

UNITED STATES PATENT OFF! FLUID DISCHARGE APPARATUS Thomas C. Shiels, Toronto, Ontario, Canada, assignor to Elias Rogers Company Limited, Toronto, Ontario, Canada Application March 19, 1937, Serial No. 131,873

Claims. (Cl. 29958) This invention relates to apparatus in which I I, preferably electric, is included in the conduit. the flow of a fluid to and through an outlet is In practice various refinements are included in liable to be interfered with by low temperature the circulating and heating system but as both and is described as adapted to apparatus in which the general arrangement and details are old in 5 the fluid flowing is a heavy oil but which may be the art these details are neither shown nor de- 5 used with other fluids. scribed.

Apparatus is now in use in which hot oil is Referring particularly to Figs. 2 and 3, it will sprayed from an outlet nozzle to lay the dust as be seen that the supply conduit I has connected coal is fed down a chute to a container. thereto at spaced points a shunt conduit l As the oil is cut ofi adjacent the outlet when The part l of the conduit l between the points 10 no coal is being fed and frequently for considof connection of the shunt conduit is provided erable periods of time, it is often found that the with means for restricting the flow of oil thereheavy oil used will, in cold weather, so increase through to ensure a flow through the shunt conin viscosity adjacent the outlet that it will not duit. This may be done by restricting the cross spray satisfactorily but flow inathick stream. sectional area of part or whole of the part I. 5

This is unsatisfactory and also wasteful, and I show, for example, the part I as a pipe of my object is to devise means for maintaining the smaller bore than that of the pipe forming the oil in a sprayable condition at the nozzle at all shunt circuit. A valve 12 might also be 11566. times, particularly during cold weather and when instead of or in addition to the permanent rethe flow at the nozzle is cut off. striction of the bore of the part l 20 I attain my object by means which may be From the part l of the supply conduit extends briefly described as follows. the branch pipe 2 supplying oil to one or more The oil is caused to flow under pressure through sp ay nOZZleS A Valve 7 is provided in s a supp-1y conduit and is maintained at a suitable branch pipe by means of Which the pp to temperature for spraying. A branch pipe leads the nozzles may be cut off at will. from the said conduit and is provided with an out- The connection between the branch pipe and let nozzle or nozzles. A pipe, forming a shunt cirthe nozzles is formed by the chamber 5 formed in cuit, is connected with the supply conduit at each the metal block 3 which forms heat exchange side of the connection of the branch pipe and means included in the shunt circuit I for heatheat exchange means is located in the shunt coning the nozzles. This block, for the stated pur- 3O duit adapted to transfer heat to the outlet nozzle. pose, is formed with a chamber 4 included in the As long therefore as heated oil is flowing in the shunt circuit, which chamber is separated from supply conduit the oil in the branch pipe and outthe chamber 5 by a metal wall through which let will be maintained substantially at the same heat from the oil in the shunt circuit passes to temperature as that in the supply conduit. heat the oil in the chamber 5. This is partic- 35 The invention is hereinafter more fully deularly important if a spray nozzle be employed scribed and is illustrated in the accompanying such as shown in co-pending application No.

drawing in which 105,208 filed October 12, 1936 in which there is a Fig. 1 is a diagram showing the general archeck Valve included in the spray nozzle and oil rangement of the spraying system; is held in the chamber 5 when the valve 1 is closed 40 Fig. 2 a plan view on a larger scale of the or in cases Where the nozzle is arranged to spray arrangement of the spraying apparatus; and upwardly in Which case oil is also pocketed in the Fig. 3 a section on the line 3-3 in Fig. 2. chamber 5. The nozzles 6 are also directly heated In the drawing like numerals of reference indiby conduction from the block 3 into which they cate corresponding parts in the difierent figures. are screwed. 45

Referring to Fig. 1 of the drawing, l is the The branch pipe 2 is also heated by conduction supply conduit in which oil is circulated by means from the block 3 and also by conduction from of the pump ID. A pressure relief valve 9 is the part I of the supply conduit. provided in this conduit adjacent the suction side Thus, when the valve 1 is closed and no oil of the pump. Any excess oil not used from the is flowing to the nozzles, the temperature of the 5 supply conduit at a predetermined pressure passes branch pipe l the valve 1 and the nozzles 6 is back to the pump. The pump draws its supply of kept at such a height as to prevent the oil confresh oil from the tank 8 through the pipe l3 gealing therein, since at all times hot oil is being which is connected with the conduit l between circulated in the supply conduit I, I and the the pump and the pressure relief valve. A heater shunt conduit I Thus the production of a 55 proper spray from the nozzles is ensured at all times and waste is prevented.

Any type of outlet may be employed, as also any known form of heat exchange means. Vari- 5 ous changes might also be made in the details of construction to flt the apparatus for use with fluids other than oil and which would fall within the scope of my invention.

What I claim as my invention is:

1. In fluid discharge apparatus, the combination of a supply conduit; means for causing a flow of fluid through said conduit; a branch pipe leading from said conduit and provided with an outlet nozzle; a shunt conduit connected with the supply conduit at each side of the connection of the branch pipe and through which part of the fluid passes; and heat exchange means located in the shunt conduit and adapted to transfer heat from the shunted fluid to the outlet nozzle.

2. In fluid discharge apparatus, the combination of a supply conduit; means for causing a flow of fluid through said conduit; a branch pipe leading from said conduit and provided with an outlet nozzle; a shunt conduit connected with the supply conduit at each side of the connection of the branch pipe and through which part of the fluid passes; heat exchange means located in the shunt conduit and adapted to transfer heat from the shunted fluid to the outlet nozzle;

and a cut-off valve located in the branch pipe.

3. In fluid discharge apparatus, the combination of a supply conduit, means for causing a flow of fluid through said conduit; a branch pipe leading from said conduit and provided with an outlet nozzle; a shunt conduit connected with the supply conduit at each side of the connection of the branch pipe and through which part of the fluid passes; a restriction in the supply conduit between the points of connection of the shunt conduit to ensure a part of the fluid flow passing through the shunt circuit; and heat exchange means located in the shunt conduit and adapted to transfer heat from the shunted fluid to the outlet nozzle.

4. In fluid discharge apparatus, the combination of a supply conduit; means for causing a flow of fluid through said conduit; a branch pipe leading from said conduit and provided with an outlet nozzle; a shunt conduit connected with the supply conduit at each side of the connection of the branch pipe and through which part of the fluid passes; a restriction in the supply conduit between the points of connection of the shunt conduit to ensure a part of the fluid flow passing through the shunt conduit; heat exchange means located in the shunt conduit and adapted to transfer heat from the shunted fluid to the outlet nozzle; and a cut-off valve located in the branch pipe.

5. Oil spraying apparatus as set forth in claim 1 in which the heat exchange apparatus comprises a metal block having a chamber therein forming part of the shunt conduit and a second chamber therein forming a part of the branch pipe, the two chambers being in heat exchange relationship.

THOMAS C. SHIELS. 

